EP 0859567 B1 20000223 - IMPELLER FOR VACUUM CLEANER WITH TAPERED BLADES
Title (en)
IMPELLER FOR VACUUM CLEANER WITH TAPERED BLADES
Title (de)
VERJÜNGTE LAUFRADSCHAUFELN FÜR STAUBSAUGER
Title (fr)
TURBINE D'ASPIRATEUR A PALES TRAPEZOIDALES
Publication
Application
Priority
- US 9612847 W 19960802
- US 55511695 A 19951108
Abstract (en)
[origin: US5573369A] A fan for a vacuum cleaner has a fan housing, a motor and an impeller. The fan housing has an inlet, an outlet, a scroll-shaped side wall, a back wall and a flat front wall. The impeller has a hub and multiple blades. The blades have a leading edge that is tapered upward, a top edge that is tapered downward, and a trailing edge that is tapered downward. Such tapering of the top edge and trailing edge provides less noise and better durability without diminishing air performance.
IPC 1-7
IPC 8 full level
A47L 5/22 (2006.01); F04D 29/28 (2006.01)
CPC (source: EP US)
A47L 5/22 (2013.01 - EP US); F04D 29/281 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 5573369 A 19961112; AT E189855 T1 20000315; AU 6719596 A 19970529; AU 692116 B2 19980528; CA 2229513 A1 19970515; CA 2229513 C 20000118; DE 69606774 D1 20000330; DE 69606774 T2 20000921; EP 0859567 A1 19980826; EP 0859567 B1 20000223; NO 319902 B1 20050926; NO 981997 D0 19980504; NO 981997 L 19980504; WO 9717007 A1 19970515
DOCDB simple family (application)
US 55511695 A 19951108; AT 96927335 T 19960802; AU 6719596 A 19960802; CA 2229513 A 19960802; DE 69606774 T 19960802; EP 96927335 A 19960802; NO 981997 A 19980504; US 9612847 W 19960802